R help - Aug 2010 - about the trend comparison by R

Hi all:
I've 2 groups of data,which are measured at:
1990,1991,1992,...2000.
 
I wanna know whether the trend of 2 groups are same or not.
 
Maybe time series analysis is suitable,but I don't know which index is fit
for my purpose,and how to get the index from function of time series analysis
under R environment.

Thanks a lot.
My best
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Is this home work? Please remember that the R listserver  Is not
designed to answer home work problems. 

Hint: Assume you are interested in an outcome variable y. Regress y on
year include a group term and a group by year interaction. The
interaction term tells you what you want.
John
John Sorkin
Chief Biostatistics and Informatics
Univ. of Maryland School of Medicine
Division of Gerontology and Geriatric Medicine
JSorkin at grecc.umaryland.edu 
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Sent: 8/1/2010 10:37:20 PM
Subject: [R] about the trend comparison by R

Hi all:
I've 2 groups of data,which are measured at:
1990,1991,1992,...2000.
 
I wanna know whether the trend of 2 groups are same or not.
 
Maybe time series analysis is suitable,but I don't know which index is
fit for my purpose,and how to get the index from function of time series
analysis under R environment.

Thanks a lot.
My best
	[[alternative HTML version deleted]]

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